CA2178468A1 - Differential Conductivity Hemodynamic Monitor - Google Patents

Differential Conductivity Hemodynamic Monitor

Info

Publication number
CA2178468A1
CA2178468A1 CA 2178468 CA2178468A CA2178468A1 CA 2178468 A1 CA2178468 A1 CA 2178468A1 CA 2178468 CA2178468 CA 2178468 CA 2178468 A CA2178468 A CA 2178468A CA 2178468 A1 CA2178468 A1 CA 2178468A1
Authority
CA
Canada
Prior art keywords
liquid
connection
conductivity cell
electrical current
branches
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2178468
Other languages
French (fr)
Other versions
CA2178468C (en
Inventor
Francis T. Ogawa
James M. Brugger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gambro Renal Products Inc
Original Assignee
Francis T. Ogawa
James M. Brugger
Cobe Laboratories, Inc.
Gambro, Inc.
Gambro Renal Products, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/472,268 external-priority patent/US5631552A/en
Application filed by Francis T. Ogawa, James M. Brugger, Cobe Laboratories, Inc., Gambro, Inc., Gambro Renal Products, Inc. filed Critical Francis T. Ogawa
Publication of CA2178468A1 publication Critical patent/CA2178468A1/en
Application granted granted Critical
Publication of CA2178468C publication Critical patent/CA2178468C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • External Artificial Organs (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The presence of air bubbles entrained in a liquid flowing through a tube is detected flowing the liquid through a conduit which comprises a conductivity cell with a continuous path configuration. An electrical current is induced in the liquid in the conductivity cell. The electrical current in the liquid in the conductivity cell is sensed and interpreted, a decrease in the electrical current being indicative of the presence of an air bubble in the liquid. The conductivity cell comprises an upstream connection, a downstream connection, and two branches connecting the upstream connection to the downstream connection with a continuous path configuration from the upstream connection to the downstream connection through one of the two branches and returning to the upstream connection through the other one of the two branches.
CA 2178468 1995-06-07 1996-06-06 Differential conductivity hemodynamic monitor Expired - Fee Related CA2178468C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/472,268 US5631552A (en) 1992-09-30 1995-06-07 Hemodynamic monitor for detecting air bubbles
US08/472,268 1995-06-07

Publications (2)

Publication Number Publication Date
CA2178468A1 true CA2178468A1 (en) 1996-12-08
CA2178468C CA2178468C (en) 2000-09-05

Family

ID=23874811

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2178468 Expired - Fee Related CA2178468C (en) 1995-06-07 1996-06-06 Differential conductivity hemodynamic monitor

Country Status (1)

Country Link
CA (1) CA2178468C (en)

Also Published As

Publication number Publication date
CA2178468C (en) 2000-09-05

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